Biogenic weeding composition for corn fields

The invention relates to the technical field of pesticides, in particular to biogenic weeding composition for corn fields. The biogenic weeding composition for the corn fields is prepared from components in parts by weight as follows: 80-160 parts of biogenic active matter, 0.5-5 parts of chemical active matter, 0.05-1 part of a photocatalyst and 0.005-0.01 parts of hydrogen peroxide; the chemicalactive matter comprises a component (a) and a component (b), the component (a) is fluthiacet-methyl, and the component (b) is selected from one or two of rimsulfuron and atrazine. According to the biogenic weeding composition for corn fields, the biogenic active matter and the chemical active matter are compounded, so that the use amount of the chemical active matter is greatly reduced, and the biogenic weeding composition has better stability and pesticide effect, is easily degraded in greater circulation of the nature, and is good in environmental compatibility; with addition of the photocatalyst, herbicide residue